Lead Backend Engineer (f / m / x) API & Platform

Hamburg Hybrid (2–3 days / week onsite) | 30 Days Vacation | English B2

Are you enthusiastic about intelligent and effective software solutions to the energy transition?

Join us at suena energy as Senior Backend Engineer (f / m / x) and become a founding member of our new platform team. Shape complex backend systems and APIs that integrate data, analytics, and optimization for real-time energy trading. Help us scale our infrastructure and enable the next generation of clean energy solutions.

suena energy is a green tech startup specializing in algorithmic energy trading for energy storage systems and renewables.

Our vision :

a world where clean energy is used reliably, economically, and intelligently. Our AI-powered software maximizes the revenues of large-scale energy storage and renewable assets on European short-term power markets—while minimizing risk.

We're a team of 38 people, combining a warm, supportive team culture with true startup drive. Following our successful Series A, we're now building a dedicated platform integration team from scratch—relieving our modeling and data science teams from operational bottlenecks. As one of the first Senior Engineers, you'll have real ownership, direct impact, and the chance to shape our technical standards and team culture.

Quick Check : Is this your next Engineering Playground?

• Tech Stack : Python (Django / FastAPI), PostgreSQL / TimescaleDB, Redis, Celery, Docker, AWS, GitLab CI / CD, Sentry, Grafana
• Your Focus : Scalable API and backend architecture, event-driven systems, new feature development, legacy API improvements, secure user management
• Team : Newly formed platform squad with two Senior Engineers, one Junior Engineer, and one Modelling expert transitioning from the Modelling team, direct CTO access, collaborative culture, async-friendly, regular pair programming
• Product : Advanced energy trading & optimization platform, real-time APIs, data-driven, ML-integrated, high complexity
• Who thrives here : Senior backend engineers with leadership ambition, cloud & API experience, and a love for robust, scalable systems
• Must-haves : 5+ years backend experience, cloud deployment, API authentication & authorization, zero-downtime deploys, experience with user management systems, security mindset
• Dealbreakers : No cloud / API / auth experience, mainly CRUD web app background, desire to work fully solo

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